Shock absorber



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lNvNToR flgazz I BY ZM* V I ATroRNEYs ,mfr- Lomv Filed Sept. 10,. 1926 MW 47 .Il

.15 costly proceedin Patented' Qct. 16,

maar n. noem, or omesso, memoirs.

' asoman applicati@ mea september 1o', i928. Vman n. 134,142.

My invention relates to shock absorbers of the hydraulic type, and it consists in the combinations, constructions', and arrange'- ments herein described and claimed. Y

Shock. absorbers of the hydraulic type in which ablade or vane is' actuated w en an obstructionisencountered'on the road that tends to. compress the springsv 'of the vehicle, and in which the rebound ischecked by fluid which tends to op ose the' movement of the vane, ordinari y require considerable machining on the interior in order to make. the device operate properly. -In certain constructions of this type, it is a of tov machine the interior, .since it is generally of irregular shape. An objectl of my invention is to provide .a shock absorber of the type mentioned Vin which the machining of the parts is reduced to a minimum.

A further ob'ect of the inventionis to provide a relie valve in the main valve of the vane which normally will vremain closed, but which under an .abnormal pressure -will open to relieve the'pressure,

and thus cause the smoothly. A

A further object of the inventionis to provide a device of the type described in which the by-pass has an adjustable regulatin member which may be set from the exterlor 'of the casing to permit a greater 'or a less fiow'of the Huid therethrough.

L" A furtherl object; of the invention'is-to 3 5 provide' a 'shock 'absorber' which is-simple .device tooperate construction, and relatively cheap to` manufacture, and at the same time which is strong enough to function properly under all condltions of use.

in the following specification, and the novel '.eatures lof the invention will be particularly pointed out in the appended claims. c 'My inve tion-is illustrated in the accompanying drawings, forming part of this application, in'w lch igure 1 is a side view of the device as ap lied to a vehicle,

igure 2, and

igure 2 is a longitudinal sectional view of the device,

Figure 3 is a section at right angles to Figre 2 substantially along the line 3--3 VInqcarrying out 'my invention-,1 provide a casing which I have denoted in neral by'A, and comprising a c 1 `aving a cover plate 2 Vsecured thereto. hecasin 1 s substantially fan-shaped and is provided Awith extensions 3 and 4 having bosses 5`with openings 6 therethrough by means of which i thecasing is lirmly secured to the chassis frame 7 of ayehicle, such as an automobile. At 8, I have shown a cylindrical bore in the casting. which is arranged to receive the `cylindrical ortion 9 of a vane 10. The vane and t e shaft are constructed integrallyl and the` latter forms a pivot about the central axis of which the vane mayA oscillate. The casing has afan-shaped interior and centrally disposed in this interior is an integral rib 11 which divides the chamber into two compartments. The rib 11 is expanded into ay circular boss 12, this boss being provided with cutaway portions 13 and 14, respectively.- It is also provided with a recess 15 arranged to receive the head 16 of a iiuid regulator. The shank 17 of the luid-iiow`regulator extends through an opening 18 and to the outside of the casing where it is held in position by means of a nut 19. This regulator has Y a slot 20 cut inv the head 16, the slot having sloping sides as will be seen in Figure 4. The arrangeinent is such that the slot 20 may be turned to register with'the cutaway portions 13 and 14, thereby. permitting ailow of the-duid from one .compartment on one side of th'e rib 11 toi the other. Q f course when the sl'ot V20V is turned with its axis. parallel with the rib, all flow is shut off, and

it may be turned so as to permitany iiow desired up .to the full diameter of the' slot. 40 Other'objects and advantages will appear The purpose of the sloping sides is to give a more gradual ope regulator turned. T e regulator is set.

`fashioned 'into a head 23,'tl1e opposite end being provided with a stop flange. 24, and

Springs 25V being 'about the -guide pins and on'one falce of thefvane. The central portion of the vaneI has an opening 26. The valve 21- also has openings'27 as the Huid-How of course before use at Vthe point where it los which are covered, normally by a plate 28 held by a pin 29 that has a sprintr 30 which bears against a stop langel an normally kee s t e openings 27 closed. The outer end of t e vane is extended'laterally to form a bearing shoe 32 which bears on the arcshaped rib 32 in the inner portion 33 of the These side wa casting. The ends of this bearing shoe are extended so that it limits the movement of the vane in either direction; Connecting the.

From the foregoing description of the various .parts of the device, the operationv thereof may -be readily understood. It will be vnoted that in making the casing,'there is no necessity of machining the interior of the casting, except, as stated, on the surface of the rib including the arc-shaped surface against which the shoe travels. This cuts down the expense ofV making' the casing, while it provides a virtuallyiluid-tight contact between the side walls of the vane and the ribs on the casting andv cover, so that u there is little tendency for (the Huid to get from one side of the vane to the other, ex-

cept through the by-pass, or through the valve.

Consider Figure 1. When an obstruction is reached and the spring 36 is compressed,

the arm 37 which ispivotally connected at 38'to the arm 39 secured tothe shaft 9, will cause the latter to rotate and to move the vane toward the full line position shown 111 Figure 2. During this movement, the valve v21 is forced by the liquid to open and the liquid will pass through the central opening 26 esily, When the yrebound comes, the

Y valve will close and theliquidmust then pass by way of the by-pass from one compartment to the other. Where there isa normal rebound, the. valve 28 will reniam closed, but in case the pressure becomes too '4 great, then the auxiliary valve open tb permit the ilow .of the'uid backwardly through the central o ning, as well as through Ithe by-pass. f course, when the pressure is decreased, this auxiliary' valvewill close and the remainder ofthe action will be accomplished by-the passin of the liquid through-the lay-pass.: It may e necessary at times to vary t e veiectve opening of the by-'pass as in coldweather when the oil,

vif oil` is used, etsy thicker and opposes more resistance to t e flow. This may be-done b unloosening the nut l19 and turning the t readed portion of the valve so as to open shapedcasin'g having rinwardly pro up the by-pass to any desired extent, and then retightening the nut. done from the exterior without any necessity of opening the casing.

The arrangementv described rovides a ruggedconstruction which is ad]ustable for various conditions, and which can be manufactured at a relatively low cost, since the machine work is cut to a minimum;

I claim:

k1. In a shock absorber, a casing, a pivot shaft, a vane carried by said pivot shaft, and hav-ing a. centralI opening, a valve carried by the vane for controlling the centralopening, said' valve being movable by fluid ressure 'when `the vane `is moving in Aone 'rectibn, and an auxiliary valve carried by the vane and also controlling said central opening and adapted to be operated by an obnormal fluid pressure when the vane is moving in the opposite direction.

2. A- shock absorber comprising a fanshape'd casing having inwardly projecting ribs-and an arc-shped end, aivot shaft, a vane carried by said pivot sha and having a. shoe arranged to contact with the arcshaped end, and side walls between the shoe and the pivot shaft, said side walls being arranged to bear on the ribs. i.

3. A shock absorber comprising a fanshaped casing having inwardly projecting ribs and an arc-sha ed end, a ivot shaft,

a vane carried/by sald pivot sh t and having a shoe arranged to contact with the arcshaped end, side walls between the shoe and the pivot shaft, said side -walls being arranged'to bear on the ribs, a byass extending through one of the ribs, an means for regulating the effective opening of the by-V pass. I

4. A shock absorber comprising a fan- 'ecting ribs and an arc-shaped'end,a ivot s aft, a vane carried by said pivot shaFtl a shoe arranged to contact with the arc-` shaped` end, side walls betweenthe she and the pivot shaft, said side walls being arranged to bear on the ribs, a by-pass through one of the ribs, and means for regulating the eifectiveopening of the by-pass', said mea-ns comprising a rotatable pin having a slot This may be.

and having lll therethrough arranged to be vbrought into or out of registration with the portions of the byrpase 5. A shock absorber comprising a fanshaped casing having inwardly projecting ribs and an arc-shaped end, a pivot shaft,

avane carried by said pivot shaft and the arc-sha end, side walls between the shoe and t e ivot shaft, said side walls being arran to bear on the yrlbs, a

for regulating the effective opening of the by-pass, sald means comprising a rota- -having a'- shoe arranged -to contact with Y by-pass through one of the ribs, means projecting r'b, disposed radiallyto the axis with which rib said vane conof the vane,

to which said vane tac-ts in all positions maybe moved.

7. A hydraulic shock absorber comprising a vane and a casing wherein said vane is pivota y mounted, said casingcomprisn f a dished element and a cover plate. sai dished element of thecasing being Vprovided concave surface with' end of thevane contacts in all positions to plane a dished with -an inwardly projecting rib having a which the unpivoted which the vane may be moved.

8. A hydraulic shock absorber comprising avane and a casing'wherein said vane is pivotally mounted, saidcasing comprising member andV a cover plate, sai dished member provided with an inwardly projecting rib, disposed radially to theaxis of the vane, with which saidorib a lateral surface of the. vane contacts in all positions to which said vane may be moved, said dished member being provided with a second inwardly 'projecting' rib disposed atlright angles to the first rib,

said second rib provided with a concave surface with-'which 'the unpivoted extremity of the vane contacts in all the Vvanemaybe moved.

9. A hydraulic shock absorber comprising a vane and a casing wherein said vane is pivotally mounted, said casing comprising a positions to which dished member and a cover plate for the open` side of the dished member, said dished member and cover plate provided with inwardly projecting ribs disposed radially I the axis Vofthe vane, said 'dished member providedwith a third rib'disposed at right angles to and connecting the rst mentioned ribs, said third rib having a concave inner surface, said ribs contacting with said vane in all positions lto which the latter may be moved and cooperating 'with the vane always ngo, divide the casing-into two distinct chamers. 10. A hydraulic shock absorber comprising a vane and a. casing wherein the vane isj pivotally' mounted, said vane provided with a lateral plane surface, at right angles to the vane axis, said casing provldedwith 'a rib, 60 with which rib the radialf to the vane axis, vane contacts -1n all positlonsto which 1t` may be moved, a valve recess'm sald rib, a. v

:transverse slot in the rib intersecting saidrecess, and a slotted rotary valve member, '65

o rable from the 'exterlor of the casing, disposed in said recess, having its innersurface flush with the inner surface of the rib and being adapted to regulate ithe flow of fluid through said'lo transverse Slot; *f

11. Ahydraulicshockabsorber comprising l "a vane and acasing whereihxthe vane is pivotally mounted, said vane provided .with a lateral Elane surface, at ri vane axis, said casing vprovided with a rib, radial to the vane axis, with which rib the vane contactsY in all positions .to which it may be moved, a v'alve recess in "the rib, a transverse slot in v'lthe rib intersecting 80 said recess, a rotary valve member operable from the exterior of the casingbdlsposed in vsaid recess, said Avalve mem r being provided, with a slot having Vconverging sides, 'said slot adapted to be brought more or les into registry with the Ytransverse slot in the rib to regulate the flow of-uid. past the rib.

HENRY n. LOGAN said valve member ht angles tothe in the valve member being 

